Odpowiedź :
3 (x - 4) = 1/3 (x + 9)
3x - 12 = 1/3x + 3
3x - 1/3x = 3 + 12
2 2/3x = 15
8/3x = 15 /• 3/8
x = 45/8
x = 5 5/8
3x - 12 = 1/3x + 3
3x - 1/3x = 3 + 12
2 2/3x = 15
8/3x = 15 /• 3/8
x = 45/8
x = 5 5/8